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/*
* Copyright (C) 2017-2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/PrintStream.h>
#include <wtf/SinglyLinkedListWithTail.h>
namespace JSC {
class BlockDirectory;
class Heap;
class Subspace;
class AlignedMemoryAllocator {
WTF_MAKE_NONCOPYABLE(AlignedMemoryAllocator);
WTF_MAKE_FAST_ALLOCATED;
public:
AlignedMemoryAllocator();
virtual ~AlignedMemoryAllocator();
virtual void* tryAllocateAlignedMemory(size_t alignment, size_t size) = 0;
virtual void freeAlignedMemory(void*) = 0;
// This can't be pure virtual as it breaks our Dumpable concept.
// FIXME: Make this virtual after we stop suppporting the Montery Clang.
virtual void dump(PrintStream&) const { }
void registerDirectory(Heap&, BlockDirectory*);
BlockDirectory* firstDirectory() const { return m_directories.first(); }
void registerSubspace(Subspace*);
// Some of derived memory allocators do not have these features because they do not use them.
// For example, IsoAlignedMemoryAllocator does not have "realloc" feature since it never extends / shrinks the allocated memory region.
virtual void* tryAllocateMemory(size_t) = 0;
virtual void freeMemory(void*) = 0;
virtual void* tryReallocateMemory(void*, size_t) = 0;
private:
SinglyLinkedListWithTail<BlockDirectory> m_directories;
SinglyLinkedListWithTail<Subspace> m_subspaces;
};
} // namespace WTF
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